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Subject: Re: [PATCH v2 1/6] driver core: Move the "authorized" attribute from
 USB/Thunderbolt to core
To:     Dan Williams <dan.j.williams@intel.com>,
        Yehezkel Bernat <yehezkelshb@gmail.com>
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From:   "Kuppuswamy, Sathyanarayanan" 
        <sathyanarayanan.kuppuswamy@linux.intel.com>
Message-ID: <c701ca61-4e7d-1060-102f-8f92dd6e6802@linux.intel.com>
Date:   Thu, 30 Sep 2021 12:50:12 -0700
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On 9/30/21 12:04 PM, Dan Williams wrote:
>>> That's why it was highlighted in the changelog. Hopefully a
>>> Thunderbolt developer can confirm if it is a non-issue.
>>> Documentation/ABI/testing/sysfs-bus-thunderbolt does not seem to
>>> answer this question about whether authorized_show and
>>> authorized_store need to be symmetric.
>> Apparently, Bolt does read it [1] and cares about it [2].
> Ah, thank you!
> 
> Yeah, looks like the conversion to bool was indeed too hopeful.
> 

IIUC, the end result of value "2" in authorized sysfs is to just
"authorize" or "de-authorize". In that case, can the user space
driver adapt to this int->bool change? Just want to know the
possibility.

-- 
Sathyanarayanan Kuppuswamy
Linux Kernel Developer